toughness

Noun
  1. Enduring strength and energy (synset 105040073)
    is a type of: endurance - the power to withstand hardship or stress
    subtypes: legs - staying power
    same as: stamina, staying power
  2. The property of being big and strong (synset 105038369)
    is a type of: strength - the property of being physically or mentally strong
    same as: huskiness, ruggedness
  3. The elasticity and hardness of a metal object;
    Its ability to absorb considerable energy before cracking (synset 105028701)
    is a type of: elasticity, snap - the tendency of a body to return to its original shape after it has been stretched or compressed
    same as: temper
  4. Impressive difficulty (synset 104718142)
    is a type of: difficultness, difficulty - the quality of being difficult
    same as: formidability

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